Mandrel for phonographic records.



PATENTED JAN. 22

0. '0. SHIGLEY. MANDREL FOR PHONOGRAPHIC RECORDS;

APPLICATION FI'LED FEB.17, 1905.

- WitQQSSQS' records is particularly adapted for use in phonographs suchas illustrated and de' wheel I) being shown in full lines.

UNITED STATES OFFICE.

CYRUS C. S HIGLEY, OF HART, MICHIGAN, ASSIGNOH TO THE MULTI .PHONOGRAPHCOMPANY INCORPORATED, OF GRAND RAPIDS,

MICHIGAN.

Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed February 17, 1905. seen to. 246.147.

To all 1071 0111, it new; concern:

Be it known that I, CYRUs C. SHIGLEY, a citizen of the United States,residing at the village of Hart, in the county of Oceana and State ofMichigan, have invented certain new and useful Improvements in Mandrelsfor Phonographic Records, of which the following is a specification.

This invention relates to improvements in mandrels for phonographicrecords.

My improved mandrel for phonographic scribedin United States LettersPatent No. 773,164, issued to me on October 25, 1904, although it isdesirable for use in other relations.

The objects of my invention are, first, to provide an improved mandrelfor phonographic records by which the mandrel is properly' centered;second, to provide an improved mandrel for phonographic records by whichthe mandrel may be readily adjusted longitudinally to bring the sameinto proper relation to the phonographic -mechanism; third, toprovide-an improved mandrel for phonographic records by which the recordis yieldingly supported to allow the expansion or contraction thereofunder varying temperatures.

Further objects and objects relating to structural details willdefinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly defined, and pointed out in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawings, forming a part of thisspecification, in which- I Figure l-is a central longitudinal view of myimproved mandrel for phonographic records with the record in positionthereon, the mandrel-shaft B, spring B, and friction- Fig. 2 is anenlarged cross-sectional view taken on a line corresponding to line 2 2of Figs. 1 and 3.

Fig. 3 is an enlarged detail view showing the manner of securing thehead. C upon the shaft/ same.

In the drawings similar letters of reference refer to similar partsthroughout the several views.

Referring to the drawings, the mandrelshaft B is provided with asuitable bearingpivot at each end- The shaft is provided with adisk-like friction-wheel b. On the shaft B are inwardly-facing conicalheads 'C.

These heads are mounted upon sleeves C,

adapted to receive the mandrel-shaft B.

The inner head is held yieldingly outward by the coiled spring B,arranged between it and the friction-wheel b, as clearly appears fromthe drawings. The outer head 0 is adjustably secured to the shaft byfriction. This is preferably accomplished by indenting thecarrying-sleeve of the head, as at c.

When it is desired to place a record, as 'A, upon the mandrel, the outerhead is removed and the record placed in position. The outer head isthen adjusted upon the mandrel to the proper point to bring the recordinto proper relatlon' longitudinally to the phonographic mechanism. Theinner head. is forced into engagement with the inner end of therecord-roll by the spring B. Owing to the conical form of the heads, therecord-roll is automatically centered in relation to the mandrel-shaft,the record-rolls being held by the conical or tapered heads wedging intothe The inner head readily yields to compensate for the expansion orcontraction of the record-roll during changes of tempera ture, so thatthe record-roll is not loosened by expansion and does not becomecontracted s'oas to cause injury thereto or to prevent its readyremoval, as is sometimes the case where solid mandrels are used.

I have shown and described a mandrelshaft with a friction-wheel thereonsuch'as is particularly adapted for use in my improved phonographillustrated in my patent heretofore referred to. It is evident, however,that this may be varied to meet particular requirements. I haveillustrated and described my improved mandrel for phonographic recordsin detail in the form preferred by me, although I am aware that it iscapable of considerable variation in structural details withoutdeparting from my invention.

Having thus described my invention, what 1. The combination of a ,shafthaving a friction-wheel thereon; a pair of inwardly- 5 facing conicalheads; carrying-sleeves. for sa d heads adapted to receive said shaft; a

coiled spring arranged on said shaft between said friction-wheel and theinner head, adapted to hold the inner head yieldingly outward: and anindentation on the carrying-sleeve of theouter head adapted to hold saidsleeve in frictional engagement with the said shaft, for the purposespecified.

2. The combination of a shaft; a pair of inwardly-facing conical heads;carryingsleeves for said heads adapted to receive said shaft; a s ringadapted to hold one of the heads yie dingly toward the other; and anindentation in the carryin -sleeve of the other head adapted. to holdsaid sleeve in frictional engagement with the said shaft, for thepurpose specified.

3. The combination of a shaft havin a friction-wheel thereon; a pair ofinwar lyfacing conical heads; carrying-sleeves for said heads adapted toreceive said shaft; and a coiled spring arranged on said shaft betweensaid friction-wheel and the inner head, adapted to hold the inner headyieldingly o outward, for the purpose specified.

4Q In a mandrel for phonographic records, the. combination of a shaft;2. pair of inwardlyfacing conical heads sleeved upon said shaft; meansfor holding one of said heads yieldingly in position; and means forholding the other of said heads in frictional engagement with saidshaft, for the purpose specified.

5. The combination of a shaft; a pair of inwardly-facing conical heads;carryingsleeves for said heads adapted to receive said shaft; a springadapted to hold one of the heads yieldingly toward the other, the sleeveof the other of the heads having a frictional engagement with the saidshaft, for the purpose specified.

6. In a mandrel for phonographic records, the combination of a shaft; apair of inwardlyfacing conical heads of uniform taper slidably mountedon said shaft; means for retaining one of said heads in its adjustedposition on said shaft; and a spring for holding the other headyieldinglyin position, for the purpose specified.

In witness whereof I have hereunto set my hand and seal in presence oftwo witnesses.

CYRUS C. SHIGLEY. [L. s.]'

Witnesses:

ESTHER E. ORTH, GERRrr VANDERBEEK.

